CN217794566U - Low-energy-consumption propane dehydrogenation absorbent regeneration device - Google Patents
Low-energy-consumption propane dehydrogenation absorbent regeneration device Download PDFInfo
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- CN217794566U CN217794566U CN202221592519.XU CN202221592519U CN217794566U CN 217794566 U CN217794566 U CN 217794566U CN 202221592519 U CN202221592519 U CN 202221592519U CN 217794566 U CN217794566 U CN 217794566U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The utility model discloses a low energy consumption type propane dehydrogenation absorbent regeneration device, which comprises a hot water heating heat exchanger, a stabilizing tower feeding and discharging heat exchanger, a stabilizing tower feeding pipeline, a hot water pipeline and a stabilizing tower; the inlet of the tube pass of the hot water heating heat exchanger is connected with a hot water system through a hot water pipeline, and a feeding temperature control regulating valve is arranged on the outlet pipeline of the tube pass of the hot water heating heat exchanger; the stabilizing tower feeding pipeline is connected with a stabilizing tower feeding port through a hot water heating heat exchanger shell pass, a stabilizing tower feeding and discharging heat exchanger shell pass and a stabilizing tower feeding port in sequence, and an upper feeding port control valve, a middle feeding port control valve and a lower feeding port control valve are arranged on the stabilizing tower feeding port; the utility model discloses the working method is adjustable to effectively reduce propane dehydrogenation absorbent regeneration energy consumption.
Description
Technical Field
The utility model relates to a propane dehydrogenation device, concretely relates to propane dehydrogenation absorbent regenerating unit.
Background
The propane dehydrogenation absorbent regeneration device is used for separating propane and propylene absorbed by the absorbent, so that the absorbent is recycled, and the core device is a propane dehydrogenation device stabilizer, and a tower bottom bypass is connected with a steam reboiler. When the device works, the pipeline at the upper end of the tower body feeds materials, the steam reboiler heats the materials, the mediums extracted from the tower top are propane and propylene, the medium extracted from the tower bottom is gasoline, and the feeding is processed by about 300t/h. The process has high heat energy consumption, especially large steam consumption required by the heating of the tower bottom reboiler, and increases the production cost.
Disclosure of Invention
The utility model aims to solve the technical problem that a propane dehydrogenation absorbent regenerating unit is provided, its working method is adjustable to effectively reduce propane dehydrogenation absorbent regeneration energy consumption.
In order to solve the technical problem, the utility model discloses a low energy consumption formula propane dehydrogenation absorbent regenerating unit, including hot water heating heat exchanger, stabilizer business turn over material heat exchanger, stabilizer feed line, hot water line, stabilizer; the inlet of the tube side of the hot water heating heat exchanger is connected with a hot water system through a hot water pipeline, and a feeding temperature control regulating valve is arranged on the outlet pipeline of the tube side of the hot water heating heat exchanger; the stabilizing tower feeding pipeline is connected with a stabilizing tower feeding port through a hot water heating heat exchanger shell pass, a stabilizing tower feeding and discharging heat exchanger shell pass and a stabilizing tower feeding port in sequence, and an upper feeding port control valve, a middle feeding port control valve and a lower feeding port control valve are arranged on the stabilizing tower feeding port;
the device also comprises a temperature sensor arranged on the feed inlet of the stabilizing tower and used for detecting the feed temperature; the device also comprises a PLC controller, wherein the PLC controller is connected with the temperature sensor and the feeding temperature control regulating valve;
the device also comprises a tower bottom reboiler, the lower end of the stabilizing tower is connected to the shell side of the tower bottom reboiler through an inlet pipeline and an outlet pipeline, and the tube side of the tower bottom reboiler is connected to a steam source;
and a discharge hole pipeline at the lower end of the stabilizing tower is connected to a tube pass of the stabilizing tower feeding and discharging heat exchanger.
The use method of the low-energy consumption type propane dehydrogenation absorbent regeneration device comprises the following steps:
A. opening a feeding temperature control regulating valve, circulating hot water in a hot water heating heat exchanger, and preheating a shell pass of the hot water heating heat exchanger;
B. detecting incoming materials of a feeding pipeline of the stabilizing tower, and selecting one of an upper feeding port control valve, a middle feeding port control valve and a lower feeding port control valve as a feeding valve according to different contents of C3 and C4 in the incoming materials; the material enters the stabilizing tower through a stabilizing tower feeding pipeline, a hot water heating heat exchanger shell pass, a stabilizing tower feeding and discharging heat exchanger shell pass and a feeding valve;
C. opening a valve on a tube pass of a reboiler at the bottom of the tower, and heating materials in the stabilizing tower; at the moment, the medium extracted from the top of the stabilizer tower is propane and propylene, and the medium extracted from the bottom of the stabilizer tower is gasoline;
D. the extracted medium at the bottom of the tower is connected to the tube pass of the stabilizing tower feeding and discharging heat exchanger through a pipeline, and the waste heat of the extracted medium is used for heating the material in the shell pass of the stabilizing tower feeding and discharging heat exchanger again, so that the recovery of the extracted medium at the bottom of the tower after the waste heat is recycled is realized;
in the above steps, the temperature sensor on the feed port of the stabilizing tower detects the feed temperature in real time and transmits the feed temperature to the PLC controller, and the PLC controller adjusts the flow of the feed temperature control adjusting valve and controls the feed temperature of the stabilizing tower at 117 +/-5 ℃.
The advantages of the device are embodied in that: A. the discharge pipeline at the bottom of the stabilizing tower of the propane dehydrogenation device is connected with the shell side of the stabilizing tower feeding and discharging heat exchanger, and preheats raw materials, so that the reuse of discharge waste heat is realized. B. The upper feed port control valve, the middle feed port control valve and the lower feed port control valve with different heights are arranged, and one of the valves can be selectively used according to different incoming materials, so that the load of a stripping section of the stabilizing tower is effectively reduced, and the steam consumption of a reboiler at the bottom of the tower is reduced. C. Through PLC and the cooperation regulation hot water flow of feeding temperature control governing valve, and then accurate control stabilizer feeding temperature, hot water utilization efficiency further improves, and technological parameter control is more accurate.
Drawings
Fig. 1 is a schematic structural diagram of the low-energy consumption type propane dehydrogenation absorbent regeneration device of the present invention.
Detailed Description
The following description will further explain embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1, the low-energy consumption type propane dehydrogenation absorbent regeneration device of the present invention comprises a hot water heating heat exchanger 1, a stabilizer charging and discharging heat exchanger 2, a stabilizer charging pipeline 3, a hot water pipeline 4, and a stabilizer 5; the inlet of the tube side of the hot water heating heat exchanger 1 is connected with a hot water system through a hot water pipeline 4, and the outlet pipeline of the tube side of the hot water heating heat exchanger 1 is provided with a feeding temperature control regulating valve 9; the stabilizing tower feeding pipeline 3 is connected with a feeding hole of the stabilizing tower 5 through a shell pass of the hot water heating heat exchanger 1 and a shell pass of the stabilizing tower feeding and discharging heat exchanger 2 in sequence, and an upper feeding hole control valve 6, a middle feeding hole control valve 7 and a lower feeding hole control valve 8 are arranged on the feeding hole of the stabilizing tower 5.
The device also comprises a temperature sensor arranged on the feed inlet of the stabilizing tower 5 and used for detecting the feed temperature; the device also comprises a PLC controller, wherein the PLC controller is connected with the temperature sensor and the feeding temperature control regulating valve 9.
The device also comprises a tower bottom reboiler 50, the lower end of the stabilizing tower 5 is connected to the shell side of the tower bottom reboiler 50 through an inlet pipeline and an outlet pipeline, and the tube side of the tower bottom reboiler 50 is connected to a steam source;
and a discharge hole pipeline at the lower end of the stabilizing tower 5 is connected to the tube pass of the stabilizing tower feeding and discharging heat exchanger 2.
Referring to fig. 1, the working process of the device is as follows:
A. opening a feed temperature control regulating valve 9, circulating hot water in the hot water heating heat exchanger 1, and preheating the shell pass of the hot water heating heat exchanger 1;
B. detecting incoming materials of a stabilizing tower feeding pipeline 3, and selecting one of an upper feeding port control valve 6, a middle feeding port control valve 7 and a lower feeding port control valve 8 as a feeding valve according to different contents of C3 and C4 in the incoming materials; the material enters a stabilizing tower 5 through a stabilizing tower feeding pipeline 3, a hot water heating heat exchanger 1 shell pass, a stabilizing tower feeding and discharging heat exchanger 2 shell pass and a feeding valve;
C. opening a valve on the tube side of a reboiler 50 at the bottom of the tower, and heating materials in the stabilizing tower 5; at the moment, the medium extracted from the top of the stabilizer 5 is propane and propylene, and the medium extracted from the bottom of the stabilizer is gasoline;
D. and the extracted medium at the bottom of the tower is connected to the tube pass of the stabilizing tower feeding and discharging heat exchanger 2 through a pipeline, and the waste heat of the extracted medium is used for heating the material in the shell pass of the stabilizing tower feeding and discharging heat exchanger 2 again, so that the recovery of the extracted medium at the bottom of the tower after the waste heat is recycled is realized.
In the above steps, the temperature sensor on the feed inlet of the stabilizing tower 5 detects the feeding temperature in real time and transmits the feeding temperature to the PLC controller, the PLC controller adjusts the flow of the feeding temperature control adjusting valve 9, and when the feeding temperature is lower, the flow is increased, otherwise, the flow is reduced, so that the feeding temperature of the stabilizing tower 5 is controlled at 117 +/-5 ℃.
The utility model has the advantages that: A. one of an upper feeding port control valve 6, a middle feeding port control valve 7 and a lower feeding port control valve 8 with different heights can be selected as a feeding valve according to different contents of C3 and C4 in incoming materials; when the content of propane and propylene in the incoming material is higher, the lower feed inlet control valve 8 is selected as a feed valve. At the moment, because of the characteristics that the operating pressure of the stabilizing tower 5 is 1.5 +/-0.1 Mpa, the relative volatility of gasoline, propane and propylene is high and the like, the feeding of the stabilizing tower 5 adopts a lower feeding hole for feeding, the hot water heating heat exchanger 1 is used for heating the feeding of the stabilizing tower for the first time, and the feeding and discharging heat exchanger 2 of the stabilizing tower is used for heating for the second time, so that the feeding temperature of the stabilizing tower 5 reaches 117 +/-5 ℃, and at the moment, the propane and propylene components in the feeding position of the stabilizing tower 5 reach boiling points and start to volatilize in large quantities, thereby effectively reducing the load of the stripping section of the stabilizing tower and reducing the steam consumption of the reboiler 50 at the bottom of the tower. B. A discharge hole at the lower end of the stabilizing tower 5 is connected with a tube pass of the stabilizing tower feeding and discharging heat exchanger 2, so that the waste heat reuse of the discharge of the stabilizing tower 5 is realized, and the energy consumption is further reduced; C. through the cooperation of the PLC and the feeding temperature control regulating valve 9, the relatively accurate control of the feeding temperature can be realized, the hot water utilization efficiency can be improved, and the energy consumption can be reduced.
The utility model has the characteristics of structural design is reasonable, convenient to use, saving cost, through using, can greatly reduced stabilize tower bottom reboiler steam consumption, make enterprise's interests maximize, save manufacturing cost greatly.
The foregoing description is only intended to illustrate the principles of the invention, and various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (1)
1. A low-energy consumption type propane dehydrogenation absorbent regeneration device comprises a hot water heating heat exchanger (1), a stabilizing tower feeding and discharging heat exchanger (2), a stabilizing tower feeding pipeline (3), a hot water pipeline (4) and a stabilizing tower (5); the method is characterized in that: the hot water heating heat exchanger (1) is characterized in that a tube pass inlet is connected with a hot water system through a hot water pipeline (4), and a feeding temperature control regulating valve (9) is arranged on a tube pass outlet pipeline of the hot water heating heat exchanger (1); the stabilizing tower feeding pipeline (3) is connected with a feeding hole of the stabilizing tower (5) through a shell pass of the hot water heating heat exchanger (1) and a shell pass of the stabilizing tower feeding and discharging heat exchanger (2) in sequence, and an upper feeding hole control valve (6), a middle feeding hole control valve (7) and a lower feeding hole control valve (8) are arranged on the feeding hole of the stabilizing tower (5);
the device also comprises a temperature sensor arranged on the feed inlet of the stabilizing tower (5) and used for detecting the feed temperature; the device also comprises a PLC (programmable logic controller), wherein the PLC is connected with the temperature sensor and the feeding temperature control regulating valve (9);
the device also comprises a tower bottom reboiler (50), the lower end of the stabilizing tower (5) is connected to the shell side of the tower bottom reboiler (50) through an inlet pipeline and an outlet pipeline, and the tube side of the tower bottom reboiler (50) is connected to a steam source;
and a discharge hole pipeline at the lower end of the stabilizing tower (5) is connected to the tube pass of the stabilizing tower feeding and discharging heat exchanger (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221592519.XU CN217794566U (en) | 2022-06-24 | 2022-06-24 | Low-energy-consumption propane dehydrogenation absorbent regeneration device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221592519.XU CN217794566U (en) | 2022-06-24 | 2022-06-24 | Low-energy-consumption propane dehydrogenation absorbent regeneration device |
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| Publication Number | Publication Date |
|---|---|
| CN217794566U true CN217794566U (en) | 2022-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221592519.XU Active CN217794566U (en) | 2022-06-24 | 2022-06-24 | Low-energy-consumption propane dehydrogenation absorbent regeneration device |
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| CN (1) | CN217794566U (en) |
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2022
- 2022-06-24 CN CN202221592519.XU patent/CN217794566U/en active Active
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